Shredders
n. （食品）磨碎机( shredder的复数形式 ); 碎纸机
🗣️ 情景例句
I've been in China to work on the new project.
我一直在中国搞一个新项目。
I bought one gallon of milk.
我买了一加仑牛奶。
and by measuring the time interval between the taps and the receipt of the echoes, the depth of the sea at that point can be calculated.
测出回声间隔的时间，便可算出该处海洋的深度。